Wireless remote sensor

• US 7,358,848 B2
• Filed: 04/25/2003
• Issued: 04/15/2008
• Est. Priority Date: 11/19/2002
• Status: Expired due to Fees

• Current Assignee: Farrokh Mohamadi
• Original Assignee: Farrokh Mohamadi
• Inventors: Mohamadi, Farrokh
• Primary Examiner(s): Zimmerman; Brian
• Assistant Examiner(s): BROWN, VERNAL U
• Application Number:
  US10/422,907
• Publication Number:
  US 20040095256A1
• Time in Patent Office: 1,817 Days
• Field of Search: 340/10.34, 340/870.18, 340/539.1, 340/572.1, 340/10.1, 340/10.3, 235/491, 455/25, 455/15, 455/506, 342/372, 342/152, 342/382, 342/383, 343/700.MS, 343/853, 343/795, 343/893, 343/729, 343/751, 343/907, 343/700
• US Class Current: 340/10.34
• CPC Class Codes: G08C 17/02 using a radio link

Abstract

An integrated circuit implements a wireless remote sensor. The wireless remote sensor includes an antenna coupled to an energy distribution unit to allow passive collection of electrical charge. A signal processing unit couples to the energy distribution unit and modulates transmission by the antenna according to a binary code.

Claims

1. A remote sensor, comprising:

a plurality of integrated antenna units, wherein each integrated antenna unit includes an oscillator coupled to an antenna;

a network providing phasing information to each oscillator so as to phase lock at least a subset of the oscillators; and

a controller to control the phasing information and to modulate a transmission by the subset of the oscillators according to a binary code, wherein the integrated antenna units, the network, and the controller are all integrated on a semiconductor substrate.

2. The remote sensor of claim 1, further comprising an infra-red sensor integrated on the semiconductor substrate and coupled to the controller, wherein the controller modulates the transmission by subset of integrated antenna units in response to infra-red signals received by the infra-red sensor.

3. The remote sensor of claim 1, further comprising a kinetic sensor integrated on the semiconductor substrate and coupled to the controller, wherein the controller is configured to modulate the transmission by the antenna in response to the kinetic energy received by the kinetic sensor.

4. The remote sensor of claim 1, further comprising:

a chemical sensor integrated on the semiconductor substrate and coupled to the controller, wherein the controller modulates the transmission by subset of integrated antenna units in response to chemicals detected by the chemical sensor.

5. The remote sensor of claim 1, wherein the binary code is at least 1024 bits in length.

6. The remote sensor of claim 1, wherein the controller stores a plurality of binary codes and to modulate the transmission by the subset of integrated antenna units according to a binary code selected from the stored plurality of binary codes.

7. The remote sensor of claim 6, wherein the controller selects the binary code according to the frequency of the RF signal received at the subset of integrated antenna units.

8. The remote sensor of claim 1, wherein each antenna is a patch antenna.

9. The remote sensor of claim 1, wherein each antenna is a T-shaped dipole antenna.

10. The remote sensor of claim 9, wherein each T-shaped dipole antenna is inductively coupled to its oscillator.